AFE y/ mid pipe exhaust gasket question

Hey I recently got a AFE y pipe/mid pipe with both catalytic converters. And was to anybody else who has done this what gaskets they used or is recommended. Extreme terrain couldn’t help over the phone, but I’m just curious if anybody has a part number or if it’s the OEM donut gaskets or if there is a specific gasket recommended. I need the two for the front and the one going to the cat back which is an MBRP cat back. If anybody can, please help me with that and part numbers would be great, but either way any help is appreciated. From the quick installation video I came across and it looks like it’s OEM gaskets. And not really on a budget, but I see they have Walker brand Are a little cheaper and some other budget friendly ones so any opinions would be appreciated because I’m trying to go to the local Auto store to get what I need

 

Would just bring the issue to the auto store if you wanna get it handled locally and they are somewhat knowledgeable.

Else, measure it and see what’s going on.